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... An immersed boundary-lattice Boltzmann (IB-LB) method is employed to study the behaviors of a settling microswimmer in a narrow vertical channel (blockage ratio κ = 0.5). We perform the simulations with swimming Reynolds numbers (Reₛ) between 0.1 and 3.0 and the density ratios (γ) between 1.1 and 2.3. A two-dimensional squirmer model is used to mimic a microswimmer, finding four typical locomotive ...
... The Wuhan Ionospheric Oblique Backscatter Sounding System (WIOBSS) was applied as a bistatic radar to record the ionospheric E-region responses to a solar eclipse on 22 July 2009. The transmitter was located in Wuhan and the receiver was located in Huaian. The receiver observed anomalous echoes with larger Doppler shifts at the farther ranges compared with the echoes reflected by Es. According to ...
... Viscoelastic materials containing bubbles or drops are encountered in numerous application fields and are presently the object of much interest. The motion of bubbles and drops in these matrices can be significantly different than in Newtonian fluids. This review is restricted to the case of motion in quiescent fluids (or small Reynolds number) and small bubbles and drops that are not appreciably ...
Juliana H. Giffoni; Raffaella B. C. Teixeira; Raphael R. Wenceslau; Melina A. F. Abrantes; Jéssica G. Oliveira; Jorge T. B. Lima; Renata P. A. Maranhão; Maristela S. Palhares
gravity, etc ; catheters; hospitals; polyurethanes; starch; Show all 5 Subjects
Abstract:
... OBJECTIVES: To evaluate the maximum in vitro flow rate of 6 types of polyurethane over‐the‐wire double lumen catheters using both ports, for high volume fluid resuscitation in large animal species. SETTINGS: University teaching hospital. DESIGN: Prospective in vitro experimental study. INTERVENTIONS: The flow rate of both ports of 6 polyurethane double lumen over‐the‐wire catheters (11 and 13–Fr, ...
... Understanding how plants determine growth direction from environmental cues is important to reveal optimal strategies in plant survival. Nutritropism is the directional growth of plant roots towards nutrient sources. Our previous study showed that an NH₄⁺ gradient stimulates nutritropism in the lateral roots, but not in the main roots, of a rice cultivar. In the present study, we report nutritropi ...
gravity, etc ; aquatic environment; microplastics; pollution; Show all 4 Subjects
Abstract:
... The gravity of the impending threats posed by microplastics (MPs) pollution in the environment cannot be over-emphasized. Several research studies continue to stress how important it is to curb the proliferation of these small plastic particles with different physical and chemical properties, especially in aquatic environments. While several works on how to monitor, detect and remove MPs from the ...
... In the present study, scattering of surface gravity waves by multiple slotted vertical barriers arranged in a zig-zag manner is analyzed by employing Computational Fluid Dynamics (CFD) and validated with physical model tests. The porosity of the vertical slotted barrier is varied from 10% to 40%, and the number of slotted barriers varied from 1 to 6. The results from CFD correlate well with the la ...
gravity, etc ; ammonium; hydrophilicity; nanofibers; polyacrylonitrile; zwitterions; Show all 6 Subjects
Abstract:
... There are various methods to introduce functional groups into the membrane surface to get oil–water separation performance, but most of them involve complicated reaction conditions and processes. Inspired by click chemistry, we developed a simple method to fabricate click chemistry-modified membranes. Firstly, polyacrylonitrile and γ-mercaptopropyltriethoxysilane were mixed together to prepare nan ...
gravity, etc ; aquifers; groundwater; subsurface flow; topography; Show all 5 Subjects
Abstract:
... We characterize key features of subsurface flow paths relying on an energetic and probabilistic perspective. We consider subsurface flow in a free aquifer system as mainly ruled by gravity, the latter acting as the key driving force. Therefore, we study groundwater circulation relying upon stochastic simulations of aquifer bottom topography inferred from stratigraphic observations. Upon resting on ...
... In the process of paddy hulling, the separation of rice husks and brown rice mixture is an indispensable stage. Usually, the mixture is transported along inclined chute driven by gravity from hulling system to pneumatic separation system to complete separation. To promote segregation of mixture is the key for improving separation effect. However, the segregation law and mechanism of two-property d ...
gravity, etc ; computer software; user interface; Ecuador; Show all 4 Subjects
Abstract:
... gTOOLS is an open-source software for the processing of relative gravity data. gTOOLS is available in MATLAB and as a compiled executable to be run under the free MATLAB Runtime Compiler. The software has been designed for time-lapse (temporal) gravity monitoring. Although programmed to read the Scintrex CG-5 and CG-6 gravimeters output data files, it can be easily modified to read data files from ...
specific gravity, etc ; Lophius litulon; eggs; ontogeny; tail; Show all 5 Subjects
Abstract:
... Species of the genus Lophius spawn ribbon-shaped egg masses called an “egg veil.” Egg veils are composed of numerous mucoid chambers each enveloping eggs. The subsequent larvae have been observed to remain in the chamber for a period of time after hatching from eggs in some species of Lophius. However, the period until the larvae emerge from the egg veil is unclear. Here we discuss the timing of t ...
gravity, etc ; Bayesian theory; calibration; surveys; topography; China; Show all 6 Subjects
Abstract:
... The latest gravity survey of the gravity base network in Qinghai Province, China, was conducted with six Scintrex CG gravimeters and this gravity survey was tied to existed gravity reference stations. In this gravity network with long segments and very rugged topography, the calibration of scale factors is a time-consuming progress and its accuracy may be affected by many uncertainties, and the ch ...
gravity, etc ; climate; convection; dust; hydrologic cycle; mesosphere; Show all 6 Subjects
Abstract:
... The burst of Mars exploration in the past two decades has significantly improved our knowledge of the Martian atmosphere. A variety of complementary, multiannual observational records have revealed Earth-like cycling of dust and water through the Mars system, as well as hints of dynamical coupling between the lower, middle, and upper atmosphere involving deep convection, planetary waves, thermal t ...
gravity, etc ; catalysts; nanosheets; pH; pollutants; water treatment; Show all 6 Subjects
Abstract:
... For the first time in this study, CoAl-layered double hydroxide nanosheet membrane (LDHₘ) with abundant active sites was fabricated for peroxymonosulfate (PMS) activation with the mindset to catalytically degrade micropollutants. Depending on the catalyst loading, the developed LDHₘ can be driven under gravity at a permeate flux of approximately 80 L/m² h and 210 L/m² h at LDH loading of 0.80 mg/c ...
gravity, etc ; horizontal wells; permeability; rain; unconfined aquifer; Show all 5 Subjects
Abstract:
... Qanat is a passive (unpumped) horizontal well (or a slant well with a very mild inclined angle) that is capable of extracting water from aquifers by gravity. Many qanats are constructed along the radius of the alluvial fan wedge-shaped aquifers. Analytical modeling of such a qanat-aquifer system provides great benefit for quickly screening different designs of qanats and accessing the performance ...
gravity, etc ; energy conservation; liquids; oils; permeability; wettability; Show all 6 Subjects
Abstract:
... Gradual-transition wettability gradient is a highly promising wettability profile for driving fluid directionally transport across the thickness of porous membranes. However, the fabrication of such membranes is still challenging, limiting their further application in various fields. Here, we report a one-step strategy to fabricate membranes with gradual-transition wettability gradient (GMs) by pr ...
gravity, etc ; climate; coasts; geophysics; hydrology; research; watersheds; Greenland; Show all 8 Subjects
Abstract:
... The estimation of mass anomalies using Gravity Recovery and Climate Experiment (GRACE) data involves parameterizing the temporal gravity field using basis functions. In this study, we show that the use of irregularly shaped mass concentration (mascon) tiles that follow land/ocean boundaries reduces the leakage of land signals into ocean regions and vice versa. Leakage of signal from continents to ...
gravity, etc ; finite element analysis; magnetic fields; magnetic separation; Show all 4 Subjects
Abstract:
... Magnetic agglomeration plays a vital role in enhancing the separation of fine magnetic mineral particles. However, the forces causing magnetic agglomeration in wet low-intensity magnetic separators (LIMS) are poorly understood; this calls for improved understanding of various forces (including magnetic force (Fₘ), magnetic agglomeration force (Fₘₘ), gravity (G)) acting on magnetic particles in the ...
gravity, etc ; environmental law; glass; plastics; rubber; Korean Peninsula; Show all 6 Subjects
Abstract:
... The environmental concern of end-of-life vehicles and stringent environmental regulation like the resource conservation and recovery act of the USA, and registration, evaluation, authorization, and restriction of chemicals act of EU and Korea mandates the recycling of the ELV. The EU-Directive 2000/53/EC on end-of-life vehicles was enacted in 2000, imposed a target to recycle for reuse and recover ...